Not hugely helpful, but extremely cool
UpNext 3D Cities is a fairly limited app. But what it does, it does very neatly. If you're in Boston, Austin, New York or Washington, DC, you can get a very cool 3D map of the city. You can also choose a venue and the app will tell you about it and where it is. But, hey, it's free and it's a great way to show off that iPad you're toting.